144224551 has 4 divisors (see below), whose sum is σ = 145572552. Its totient is φ = 142876552.

The previous prime is 144224543. The next prime is 144224579. The reversal of 144224551 is 155422441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144224551 - 2³ = 144224543 is a prime.

It is a super-2 number, since 2×144224551² = 41601442222303202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144224351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673840 + ... + 674053.

It is an arithmetic number, because the mean of its divisors is an integer number (36393138).

Almost surely, 2^144224551 is an apocalyptic number.

144224551 is a deficient number, since it is larger than the sum of its proper divisors (1348001).

144224551 is a wasteful number, since it uses less digits than its factorization.

144224551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348000.

The product of its digits is 6400, while the sum is 28.

The square root of 144224551 is about 12009.3526469998. The cubic root of 144224551 is about 524.4205864677.

Adding to 144224551 its reverse (155422441), we get a palindrome (299646992).

The spelling of 144224551 in words is "one hundred forty-four million, two hundred twenty-four thousand, five hundred fifty-one".